﻿i7 



Range of Trenton Species 



At the bottom is a five inch layer of hard, coarsely crystalline, 

 light gray limestone containing Cyrtoccras. Above this are three 

 feet of very fossiliferous shaly and nodular limestone. The re- 

 mainder of the zone is made up of pure dark gray layers with 

 shaly partings. The limestone contains few fossils, but in the 

 shaly partings Monticulipora lycoperdoyi and Bellerophon bilobatas 

 are abundant. 15 ft. 4 in. == 73 ft. 



Lingula sp. , r, 

 Trematis terminalis, c, 

 Dalmanella testu din aria, c, 

 Platystrophia lynx, r, 

 Rafinesquina alternata, c, 

 Plcctambonitcs sericeus, r, 

 Zygospird recurvirostris ; r, 

 Bellerophon bilobattis, a, 



—Cyrtoceras sp. , rr, 

 Asaphus platycephalus, c, 

 Calymene senaria, c, 

 Ceranrus pleurexanthemus , r, 

 Stictopora sp., rr, 

 Monticulipora lycoperdon, a, 

 Crinoid columns, c. 



H. 48-50 of notes. Part of A., P. &. C. 



Fine grained, bluish limestone in thin layers, with shaly 

 partings, followed by rather unfossiliferous nodular limestone. 

 8 ft. 6 in. =81 ft. 6 in. 



Trematis terminalis , r, 

 Dalmanella testudinaria, c, 

 Rafinesquina alternata, r. 

 Zygospira recurvirostris, rr, 

 Bellerophon bilobatus, r, 

 Asaphus platycephalus, rr, 

 Calymene senaria, r, 



Diplograptus amplexicaulis, rr, 

 Stictopora elegantula, rr, 

 Monticulipora lycoperdon, c, 

 Ctenodo7ita uasuta, rr, 

 ""Orthoceras sps., c, 

 Fucoids, r, 

 Crinoid columns, c. 



I. 51-54 of notes. Part of A s , P. & C. 



End of the zone of Monticulipora lycoperdon. 



Three to four inch layers of nodular, impure limestone, sepa- 

 rated by rather thick layers of shale. The zone ends with a 

 layer about two and one-half feet thick, which is so nodular as 

 to appear contorted. Fossils not very well preserved anywhere 

 in this mass. 33 ft. 5 in. = 114 ft. 11 in. 



